81607830680

素因数分解:

$2^3\times 5^1\times {\mathrm{2040195767}}^1$

素因数の和:2040195778

約数の個数: 16

約数和(自身を含む): 183617619120

約数和(自身を除く): 102009788440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2040195767, 4080391534, 8160783068, 10200978835, 16321566136, 20401957670, 40803915340, 81607830680]

約数ペア:

[(1, 81607830680), (2, 40803915340), (4, 20401957670), (5, 16321566136), (8, 10200978835), (10, 8160783068), (20, 4080391534), (40, 2040195767)]